KR20120032052A

KR20120032052A - Pressure reducing valve

Info

Publication number: KR20120032052A
Application number: KR1020100072717A
Authority: KR
Inventors: 이규동
Original assignee: 이규동
Priority date: 2010-07-28
Filing date: 2010-07-28
Publication date: 2012-04-05

Abstract

PURPOSE: A pressure reducing valve is provided to enable pressure regulation using a motor and to reduce manufacturing costs and power consumption. CONSTITUTION: A pressure reducing valve comprises a valve body(100), a constant pressure maintaining unit, an operating rod and pressure sensing unit, and a pressure control unit. The valve body has a first chamber and a second chamber. The constant pressure maintaining unit controls the flow rate through the inside of the valve body. The operating rod and pressure sensing unit selectively shuts off the flow rate through the valve body and senses the pressure of the second chamber to control the pressure of the first chamber. The pressure control unit controls the constant pressure.

Description

Pressure reducing valve

The present invention relates to a pressure reducing valve device, more specifically, it is possible to control the pressure by using a motor, and by using a relatively inexpensive clutch means instead of a flow path blocking valve, manufacturing cost can be reduced and power consumption can be reduced. And a pressure reducing valve device.

In general, the pressure reducing valve device is used for the purpose of flowing out while maintaining a constant pressure by reducing the fluid, such as water, high pressure steam, air, gas.

The pressure reducing valve device is usually configured to perform a pressure reduction in response to a pressure that is frequently changed by dead weight, a spring, a diaphragm, etc. It has a structure to block or reduce inflow.

As an example of such a pressure reducing valve device, a technology having a flow path blocking function capable of forcibly blocking the flow of fluid as well as precisely and stably controlling the outflowing fluid at a constant pressure is disclosed in Korea. -2006-013060 (published September 28, 2006) has been disclosed by the present applicant in the "pressure reducing valve device having the euro shut-off function".

However, the conventional pressure reducing valve device has a problem that the pressure cannot be adjusted.

In addition, the conventional pressure reducing valve device has a problem that the manufacturing cost is increased by using a relatively high flow path blocking valve.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure reducing valve device capable of regulating pressure by using a motor.

Another object of the present invention is to provide a pressure reducing valve device that can reduce manufacturing cost and reduce power consumption by using a relatively low cost clutch means instead of a flow path blocking valve.

As a means for achieving the above object, the configuration of the present invention, the valve body having a first chamber and the second chamber, a constant pressure holding means for controlling the flow rate moving through the interior of the valve body, and the valve body Selectively blocking the flow rate moving through, and comprises a working rod and pressure sensing means for detecting the pressure of the second chamber to block the pressure of the first chamber, and a pressure control means for adjusting the static pressure.

According to one aspect of the present invention, the pressure control means includes a motor for generating rotational power, a drive shaft rotated by the motor, a clutch for transmitting or blocking rotational power of the drive shaft, and the drive shaft in its original position. It is preferable to include a return spring, a rack gear adjusting member for converting the rotational power of the clutch into a linear reciprocating motion, and a support for supporting the drive shaft, the clutch and the rack gear adjusting member.

The structure of this invention is preferable if the driven cam, the 1st stopper, and the 2nd stopper are formed in the outer peripheral surface of the said drive shaft.

The configuration of the present invention, it is preferable that the gear portion for engaging with the rack gear adjusting member is formed on the outer peripheral surface of the clutch.

The configuration of the present invention is preferably such that a third stopper is formed on the outer circumferential surface of the clutch.

The configuration of the present invention, it is preferable that the lower gear gear is coupled to the clutch to form a gear portion for converting the rotational movement into a linear movement.

It is preferable that the structure of this invention uses a step motor as said motor.

The present invention has the effect that the pressure can be adjusted by using a motor, and the manufacturing cost can be reduced and the power consumption can be reduced by using a relatively inexpensive clutch means instead of the flow path blocking valve.

1 is a front view of a pressure reducing valve device according to an embodiment of the present invention.
Figure 2 is a side view of the pressure reducing valve device according to an embodiment of the present invention.
3 is a cross-sectional view taken along line FF of FIG. 2.
4 is a cross-sectional view taken along the line GG of FIG.
5A and 5B are perspective views of a pressure reducing valve device according to an embodiment of the present invention.
6A and 6B are perspective views of a drive shaft and a clutch of a pressure reducing valve device according to an embodiment of the present invention.
7 is a view for explaining the operating state of the drive shaft of the pressure reducing valve device according to an embodiment of the present invention.
8 is a view for explaining the current, the movable iron piece, the drive gear, the flow rate, etc. according to the operating state of the drive shaft of the pressure reducing valve device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the purpose, operation, and effect of the present invention will become more apparent from the description of the preferred embodiments.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

As shown in Figures 1 to 6, the configuration of the pressure reducing valve device according to an embodiment of the present invention, the valve body 100 having a first chamber 120 and the second chamber 130, and Constant pressure holding means for controlling the flow rate moving through the interior of the valve body 100, and selectively blocks the flow rate moving through the valve body 100, by detecting the pressure of the second chamber 130 It comprises a working rod 400 and pressure sensing means for blocking the pressure of the first chamber 120, and a pressure control means for adjusting the positive pressure.

The valve body 100 may include an inlet 110 through which fluid is introduced, a first chamber 120 connected to the inlet 110, and a second chamber connected through communication holes with the first chamber 120. 130 and the outlet 140 connected to the second chamber 130 to allow the fluid to flow out.

The positive pressure holding means may include a positive pressure holding means body 210 installed in the first chamber 120, a first diaphragm 220, an orifice 230 installed in the positive pressure holding means body 210, and Control cone 240 is made to include.

The positive pressure holding means body 210 is installed to be elevated by the help of the first diaphragm 220 in the space of the first chamber 120. In addition, the central portion of the positive pressure holding means body 210 is protruded downward while forming a shape similar to a conical shape around the outflow hole, and is compatible with the communication hole. As a result, the positive pressure holding means body 210 gradually opens the communication hole as it rises, and gradually closes the communication hole as it descends, thereby adjusting the size of the flow path by the communication hole. In addition, an outlet hole is formed in the central portion of the positive pressure holding means body 210 to allow the fluid introduced into the first chamber 120 to flow out into the second chamber 130. The outflow hole is formed with a small aperture so as to have a smaller flow path than the communication hole. This is to temporarily increase the pressure of the first chamber 120 by preventing the fluid flowing into the first chamber 120 from easily flowing out when excessive flow rate is introduced from the inlet 110. As such, when the pressure of the first chamber 120 increases momentarily, the positive pressure holding means body 210 descends to rapidly reduce or block the flow path of the communication hole, thereby reducing the flow rate moving to the second chamber 130.

The orifice 230 is inserted into the outlet hole of the static pressure holding means body 210 is installed.

The control cone 240 is stably supported and fixed to the orifice 230 inserted into the outlet hole in the upper portion is inserted into the lower side of the outlet hole, the lower portion is formed in a substantially conical shape the positive pressure holding means body 210 When moving downwards) is in close contact with the inner surface of the communication hole and contributes to the reduction of the flow path. That is, the lower side of the control cone 240 is in close contact with the narrowest portion of the inner peripheral surface of the communication hole.

The first diaphragm 220 is installed below the static pressure holding means body 210 across the first chamber 120. As a result, the first diaphragm 220 raises the positive pressure holding means body 210 so that the communication hole is gradually opened as the pressure of the first chamber 120 decreases. On the other hand, as the pressure of the first chamber 120 increases, the positive pressure holding means body 210 is lowered to gradually close the communication hole. In addition, the first diaphragm 220 is connected to the inlet 110 of the valve body 100 around the periphery of the inlet hole 221 is formed therein. As a result, some of the fluid flowing through the inlet 110 of the valve body 100 may be introduced into the first chamber 120.

The operation rod 400 is formed long in the vertical direction so as to connect the pressure maintaining means and the pressure sensing means. The actuating rod 400 has an orifice inserting portion 410 which is formed relatively narrower than other portions and is inserted through the orifice 230 so as to slide vertically. In addition, it has a head portion 420 having an inclined portion 421 formed in the form of the width of the cross section in the radial direction of the outlet hole toward the upper surface. The head portion 420 is in close contact with the inlet of the orifice 230 when the operation rod 400 descends to minimize or completely block the flow rate moving through the outlet hole. On the other hand, the operation rod 400 is coupled to the pressure sensing means to the lower end to be elevated by the pressure sensing means. The operating rod 400 configured as described above adjusts the opening and closing degree of the flow path by the outlet hole while lifting by the pressure sensing means. Accordingly, the operation rod 400 may adjust the pressure of the first chamber 120. That is, as the working rod 400 rises, the flow path of the outlet hole opens wider and the outflow amount is larger than the fluid inflow amount into the first chamber 120. Then, the pressure of the first chamber 120 is reduced. On the other hand, as the working rod 400 descends, the flow path of the outlet hole is less open and the flow rate of the first chamber 120 is smaller than the fluid inflow amount of the first chamber 120, thereby increasing the pressure of the first chamber 120.

The pressure sensing means includes a pressure sensing means body 510 and a second diaphragm 520 installed in the second chamber 130 so as to elevate the working rod 400 according to the pressure of the second chamber 130. And an adjustment spring 530 that supports the pressure sensing means body 510 and the second diaphragm 520 with a predetermined force so as to stably operate.

The pressure sensing means body 510 is coupled to the lower side of the second diaphragm 520 and installed to be elevated in the second chamber 130.

The second diaphragm 520 is installed above the pressure sensing means body 510 and is coupled to the lower end of the operation rod 400 at the central portion 521. The second diaphragm 520 installed as described above swells as the pressure of the second chamber 130 rises, thereby raising the operating rod 400, and as the pressure of the second chamber 130 increases. It serves to lower the operating rod 400. For reference, the pressure of the second chamber 130 and the outlet pressure are the same.

The adjustment spring 530 is installed below the pressure sensing means body 510 to provide an elastic force in the downward direction to the pressure sensing means body 510. Then, the pressure sensing means body 510 is supported while being provided with an elastic force by the adjustment spring 530, so that the stable lifting operation without shaking even when there is an irregular and sudden pressure change in the second chamber 130 is achieved. Done. In this case, even the operation rod 400 and the static pressure maintaining means connected to the pressure sensing means can expect a stable operation.

The pressure control means may include a motor 610 for generating rotational power, a drive shaft 620 rotated by the motor 610, and a clutch for transmitting or blocking rotational power of the drive shaft 620. 630, a movable iron piece 680 fixed to the clutch 630, an electromagnet 670 for generating a magnetic force for pulling the movable iron piece 680, and a magnetic force from the electromagnet 670. If not, the return spring 640 to provide an elastic force for returning the clutch 630, the rack gear adjusting member 660 for converting the rotational power of the clutch 630 into a linear reciprocating motion, and It includes a drive shaft 620, the clutch 630, a support 650 for supporting the rack gear adjusting member 660.

As the motor 610, a step motor is used.

The outer circumferential surface of the drive shaft 620 has a structure in which a driven cam 621, a first stopper 622, and a second stopper 623 are formed.

On the upper outer circumferential surface of the clutch 630, a gear portion 631 for engaging with the rack gear adjusting member 660 and the gear portion 661 is formed, and also has a structure in which a third stopper 632 is formed. .

A lower portion of the rack gear adjusting member 660 is coupled to the gear portion 631 of the clutch 630 to form a gear portion 661 for converting a rotational movement into a linear movement.

By the above configuration, the operation of the pressure reducing valve device according to an embodiment of the present invention is as follows.

First, the state of the fluid is almost or completely blocked by the decompression function. In this state, the positive pressure holding means body 210 blocks the communication hole in the lowered state, and the head part 420 contacts the orifice 230 while the operating rod 400 is also lowered to maintain the positive pressure. The outlet hole of the means body 210 is blocked. In such a state that the flow path for fluid movement is reduced to the maximum, the inflow of the fluid through the inlet 110 or the outflow of the fluid through the outlet 140 rarely occurs.

The second diaphragm 520 when the pressure (same as the outlet side pressure) of the second chamber 130 is lowered as the fluid is used or reduced in the fluid use place (not shown) connected to the outlet 140 in this state. The pressure sensing means body 510 and the operation rod 400 are raised while the swelling. Then, the flow of fluid is generated in the first chamber 120 to pass through the outflow hole. As the working rod 400 rises further, the gap with the outflow hole increases, and the first chamber 120 through the inflow hole. The amount of the fluid flowing through the outlet hole is greater than the amount of the fluid flowing into the c). Then, as the amount of fluid filling the first chamber 120 is reduced, the pressure in the first chamber 120 is also reduced.

As such, when the pressure P2 of the first chamber 120 decreases, the first pressure diaphragm 220 swells and the positive pressure holding means body 210 coupled together also rises. When the positive pressure holding means body 210 is raised, the communication hole is opened while the flow of fluid through the communication hole is generated. As the positive pressure holding means body 210 is raised, the flow path of the communication hole is wider. The flow rate moving to the second chamber 130 is also increased.

Thereafter, when the flow rate flowing into the second chamber 130 increases and the pressure in the second chamber 130 and the outflow pressure increase, the pressure sensing means body 510 and the second diaphragm 520 of the pressure sensing means. The reaction rod descends while operating rod 400 descends. Then, as the gap between the outlet hole is narrowed due to the falling of the operation rod 400, the flow rate flowing into the second chamber 130 through the inlet hole is relatively greater than the flow rate of the outlet, and the pressure of the first chamber 120 is reduced. Increases.

As the pressure of the first chamber 120 increases as described above, the first diaphragm 220 reacts and the positive pressure holding means body 210 descends. Then, the flow path of the communication hole is reduced by the lowered static pressure holding means body 210 to reduce the flow rate flowing into the second chamber 130.

As can be seen in the above-described process, the pressures of the second chamber 130 and the outlet side are constantly changing minutely and irregularly in the middle, and the pressure sensing means body 510 and the second diaphragm 520 are each time. The working rod 400 is raised and lowered while frequently reacting to the changing pressure. Then, the pressure of the first chamber 120 is adjusted according to the lifting and lowering of the operation rod 400, and the pressure change of the first chamber 120 is immediately reflected by the lifting of the positive pressure holding means body 210 so that the first pressure is increased. The flow rate flowing into the two chamber 130 is adjusted. As such, the fluid flows out in a constant pressure state by rapidly adjusting the flow rate of the moving fluid according to the pressure of the second chamber 130 or the outlet side pressure.

Since the adjustment spring 530 supports the pressure sensing means body 510 with an appropriate elastic force, even if there is an irregular and sudden pressure change in the second chamber 130, the pressure sensing means body 510 and the operating rod ( 400) is a stable lifting operation without shaking. Therefore, even when there is an irregular and sudden change in pressure in the second chamber 130, the fluid may flow out at a constant pressure without being disturbed.

When a large amount of fluid is suddenly introduced through the inlet 110, the amount of the fluid flowing into the first chamber 120 instantly increases, and the pressure of the first chamber 120 also increases momentarily. Then, the positive pressure holding means body 210 immediately descends to block the flow rate flowing into the second chamber 130 while reducing the flow path of the communication hole. As a result, the present invention reacts rapidly at an early stage when a large amount of fluid is suddenly introduced through the inlet to adjust the flow rate flowing into the second chamber 130 early.

On the other hand, when the electromagnet 670 is operated, the magnetic force is generated from the electromagnet 670 to pull the movable iron piece 680, accordingly the clutch 630 is fixedly connected to the movable iron piece 680 drive shaft 620 ) Will be combined.

In this state in which the clutch 630 and the driving shaft 620 are coupled, rotational power is generated from the motor 610 when the motor 610 is operated, and the rotational power generated from the motor 610. Is transmitted to the drive shaft 620, the clutch 630 is such that the rotational power transmitted to the drive shaft 620 is transmitted to the gear portion 661 of the rack gear adjusting member 660 through the gear portion 631. do.

7 shows an operating state of the drive shaft 620, and FIG. 8 shows an operating state of a current, a movable iron piece 680, a drive gear, and a flow rate according to the operating state of the drive shaft 620. have. 7 and 8 illustrate the initial state of the thin film. As shown in sk of FIG. 7 and FIG. 8, when the drive shaft 620 is rotated in the clockwise direction CW, the third stopper 632 of the clutch 630 is restrained and does not rotate, and the drive cam is rotated. The driven stopper 622 is pushed up and the first stopper 622 is restrained and a current is supplied to the coil of the electromagnet 670 so that the movable iron piece 680 is adsorbed. As shown in FIGS. 7 and 8, when the driving shaft 620 is rotated counterclockwise (CCW), the third stopper 632 of the clutch 30 and the driving shaft 620 are formed. 2 stopper 623 abuts. As shown in FIGS. 7 and 8, the third stopper 632 of the clutch 30 and the drive shaft 620 when the drive shaft 620 is rotated counterclockwise (CCW). As the drive gear rotates in the counterclockwise direction (CCW) while the two stoppers 623 are in contact with each other, the rack gear adjusting member 660 is raised to compress the adjusting spring 530. As shown in FIGS. 7 and 8, when the current of the coil of the electromagnet 670 is cut off, the movable iron piece 680 is dropped, and the return spring 640 pushes the driving gears to the driving shaft 620. Power of the drive gear is cut off, the rack gear adjusting member 660 is lowered by the repulsive force of the adjustment spring 530 to reverse the drive gear.

As such, the rack gear adjusting member 660 converts the rotational power transmitted from the clutch 630 into a linear reciprocating motion to move the adjustment spring 530 connected to the rack gear adjusting member 660 up and down. The motor 610 can precisely and accurately adjust the vertical displacement of the adjustment spring 530 by controlling the rotation angle precisely and accurately as a step motor. In addition, when the adjustment spring 530 is moved up and down, the pressure sensing means body 510 is moved up and down together with the second diaphragm 520 to adjust the static pressure level of the operating rod 400.

When the electromagnet 670 is not operated, the return spring 640 returns the clutch 630 so that the clutch 630 is separated from the driving shaft 620 so that the rotational power of the motor 610 is transmitted. Block it. In this case, the adjustment spring 530 moves the rack gear adjusting member 660 so that the rack gear adjusting member 660 blocks the orifice so that the flow path blocking function is performed in parallel.

100: valve body 110: inlet
120: first chamber 130: second chamber
140: outlet 210: static pressure holding means body
220: first diaphragm 230: orifice
240: control cone 400: operating rod
510: pressure sensing means body 520: second diaphragm
530: adjustment spring 610: motor
620: drive shaft 630: clutch
640: spring 650: support
660: rack gear adjusting member 670: electromagnet
680: moving iron

Claims

A valve body having a first chamber and a second chamber,
A constant pressure holding means for controlling a flow rate moving through the inside of the valve body;
An actuation rod and pressure sensing means for selectively blocking a flow rate moving through the valve body and detecting a pressure of the second chamber to cut off the pressure of the first chamber;
Pressure reducing device comprising a pressure control means for adjusting the positive pressure.

The method of claim 1,
The pressure control means,
A motor for generating rotational power,
A drive shaft rotated by the motor,
Clutch for transmitting or blocking the rotational power of the drive shaft,
A movable iron piece fixed to the clutch,
An electromagnet for generating a magnetic force for pulling the movable iron piece;
A return spring which provides an elastic force for repositioning the clutch when no magnetic force is generated from the electromagnet;
A rack gear adjusting member for converting the rotational power of the clutch into a linear reciprocating motion;
Pressure reducing valve device characterized in that it comprises a support for supporting the drive shaft, clutch, rack gear adjusting member.

The method of claim 2,
Pressure reducing valve device, characterized in that the driven cam, the first stopper and the second stopper is formed on the outer peripheral surface of the drive shaft.

The method of claim 2,
Reduction valve device, characterized in that the gear portion for engaging with the rack gear adjusting member is formed on the outer peripheral surface of the clutch.

The method of claim 2,
Pressure reducing valve device, characterized in that the third stopper is formed on the outer peripheral surface of the clutch.

The method of claim 2,
The lower portion of the rack gear adjusting member is coupled to the clutch is a pressure reducing valve device characterized in that the gear portion for converting the rotational movement into a linear movement is formed.

The method of claim 1,
And a step motor as said motor.